Display device

Abstract

A display device includes a first electrode disposed on a substrate; a light emitting element disposed on the first electrode, the light emitting element being electrically connected to the first electrode; a second electrode disposed on the light emitting element, the second electrode being electrically connected to the light emitting element; a meta structure disposed on the second electrode, the meta structure overlapping the light emitting element; and a bank pattern disposed on the substrate, the bank pattern being spaced apart from the light emitting element.

What is claimed is: 
     
       1. A display device comprising:
 a first electrode disposed on a surface of a substrate; 
 a light emitting element disposed on the first electrode, the light emitting element being electrically connected to the first electrode; 
 a second electrode disposed on the light emitting element, the second electrode being electrically connected to the light emitting element; 
 a meta structure disposed on the second electrode, the meta structure overlapping the light emitting element in a direction perpendicular to the surface; and 
 a bank pattern disposed on the substrate, 
 wherein the light emitting element does not overlap the bank pattern in the direction. 
 
     
     
       2. A display device comprising:
 a first electrode disposed on a substrate; 
 a light emitting element disposed on the first electrode, the light emitting element being electrically connected to the first electrode; 
 a second electrode disposed on the light emitting element, the second electrode being electrically connected to the light emitting element; 
 a meta structure disposed on the second electrode, the meta structure overlapping the light emitting element; 
 a bank pattern disposed on the substrate, the bank pattern being spaced apart from the light emitting element; 
 a color conversion layer disposed on a side surface of the bank pattern and disposed on the light emitting element; 
 an encapsulation layer covering the second electrode and the bank pattern; and 
 a color filter layer disposed on the encapsulation layer. 
 
     
     
       3. The display device of  claim 2 , wherein the color conversion layer fills a space between the bank pattern and the light emitting element. 
     
     
       4. The display device of  claim 2 , wherein the meta structure comprises:
 a transparent base layer disposed on the color filter layer; and 
 a nano optical pattern disposed on the transparent base layer. 
 
     
     
       5. The display device of  claim 2 , wherein the meta structure comprises:
 a transparent base layer disposed on the encapsulation layer, the transparent base layer and the encapsulation layer being integral with each other; and 
 a nano optical pattern disposed on the transparent base layer. 
 
     
     
       6. The display device of  claim 5 , wherein the color filter layer is disposed on the meta structure. 
     
     
       7. The display device of  claim 2 , wherein the light emitting element and the bank pattern are formed on a same layer and include a same material. 
     
     
       8. The display device of  claim 7 , wherein each of the light emitting element and the bank pattern comprises:
 a first semiconductor layer; 
 a second semiconductor layer disposed on the first semiconductor layer; and 
 an active layer disposed between the first semiconductor layer and the second semiconductor layer. 
 
     
     
       9. The display device of  claim 8 , wherein the bank pattern further comprises:
 a first mask layer and a second mask layer which are sequentially stacked on the second semiconductor layer. 
 
     
     
       10. The display device of  claim 8 , further comprising:
 a reflective member disposed on the side surface of the bank pattern, the reflective member reflecting light emitted from the light emitting element in a display direction. 
 
     
     
       11. The display device of  claim 2 , wherein the meta structure comprises:
 a transparent base layer disposed on the second electrode that is disposed on a top surface of the light emitting element; and 
 a nano optical pattern disposed on the transparent base layer. 
 
     
     
       12. The display device of  claim 11 , wherein the meta structure contacts the color conversion layer. 
     
     
       13. The display device of  claim 2 , further comprising:
 a light blocking pattern disposed on the encapsulation layer and overlapping at least a portion of the bank pattern. 
 
     
     
       14. The display device of  claim 13 , wherein the color filter layer contacts a top surface of the light blocking pattern. 
     
     
       15. The display device of  claim 13 , wherein
 the light blocking pattern contacts a side surface of the color filter layer and a side surface of the meta structure, and 
 the light blocking pattern is disposed on a portion of a top surface of the meta structure. 
 
     
     
       16. The display device of  claim 2 , wherein the second electrode, the light emitting element, and the bank pattern are integral with each other. 
     
     
       17. A display device comprising:
 a first pixel, a second pixel, and a third pixel that include light emitting elements disposed on a substrate; 
 bank patterns spaced apart from the light emitting elements, the bank patterns partitioning the first pixel, the second pixel, and the third pixel; 
 a meta structure overlapping the light emitting elements and including a first meta surface, a second meta surface, and a third meta surface respectively corresponding to the first pixel, the second pixel, and the third pixel; and 
 a color conversion layer filling a space between the bank patterns and covering the light emitting elements, 
 wherein patterns of the first meta surface, the second meta surface and the third meta surface are different from each other. 
 
     
     
       18. The display device of  claim 17 , further comprising:
 an encapsulation layer covering the color conversion layer and the bank patterns; and 
 a color filter layer disposed on the encapsulation layer, the color filter layer including a first color filter, a second color filter, and a third color filter respectively corresponding to the first pixel, the second pixel, and the third pixel, 
 wherein the meta structure is disposed on the color filter layer. 
 
     
     
       19. The display device of  claim 17 , further comprising:
 an encapsulation layer covering the color conversion layer and the bank patterns; and 
 a color filter layer disposed on the encapsulation layer, the color filter layer including a first color filter, a second color filter, and a third color filter respectively corresponding to the first pixel, the second pixel, and the third pixel, 
 wherein the meta structure is disposed between the encapsulation layer and the color filter layer. 
 
     
     
       20. The display device of  claim 17 , further comprising:
 an encapsulation layer covering the color conversion layer and the bank patterns; and 
 a color filter layer disposed on the encapsulation layer, the color filter layer including a first color filter, a second color filter, a third color filter respectively corresponding to the first pixel, the second pixel, and the third pixel, wherein 
 the meta structure is disposed on the light emitting elements, and 
 the color conversion layer covers the meta structure.